Innovate has new 4in1 meter that has analog outputs. One of them is ethanol content "Brown wire: Ethanol % 0V = 0% Ethanol 5V = 100% Ethanol" I thought can this be used to control fuel multiplier to control fuel amount in ratio to ethanol?

its a bit more involved than that, the AFR scalar, crank pw, target lambda, transient fuel, and spark advance also need to be adjusted at a minimum

thats something i worked on but had no need nor desire to finish as of yet, in the near future i hope ill be getting back to it

youd need a superlogger to get the values piped into the QH, some QH firmware code needs to be written there to have a fresh set of values updated every loop and accessible on the mbus for the ecu to have access to it